add pdf reader modul

src/Knowledge/Extractor/ExtractorResolver.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Knowledge\Extractor;
+
+final class ExtractorResolver
+{
+    /**
+     * @param iterable<DocumentExtractorInterface> $extractors
+     */
+    public function __construct(
+        private iterable $extractors
+    ) {
+    }
+
+    public function extract(string $path): string
+    {
+        $extension = pathinfo($path, PATHINFO_EXTENSION);
+
+        foreach ($this->extractors as $extractor) {
+            if ($extractor->supports($extension)) {
+                return $extractor->extract($path);
+            }
+        }
+
+        throw new \RuntimeException(sprintf(
+            'No extractor available for extension "%s".',
+            $extension
+        ));
+    }
+}